2 Pack Wireless Door Window Freezer Door Alarm 3/15/30/60 Seconds Adjustable Del With its maximum 30 meters

With its maximum 30 meters waterproof ability

engineering plastics-Size: About17

DIY works or any emergency such as fire

Color:YellowSize:6*1

The sd card reader for iPhone data transmission speed can reach 20MB/s~30MB/s

2 Pack Wireless Door Window Freezer Door Alarm 3/15/30/60 Seconds Adjustable Del With its maximum 30 meters2 Pack Wireless Door Window Freezer Door Alarm 3 15 30 60 Seconds Adjustable Del 4 in 1 Multi Function: 4 modes to meet your multiple options: general alarm, constant alarm, time delay (closing alarm) and doorbell, just press the button to choose the function you need without no adjustment complicated. This contact sensor kit can quickly detect the status of your door or window. Requires 2 AAA batteries (not included). Freezer Door Alarm with Delay